11.6 Iteration F6: Testing AJAX changes 11.3 Iteration F3: Highlighting Changes
Add a blind down visual effect on the first item
edit app/views/line_items/create.js.rjs
page.replace_html('cart', render(@cart))
page[:cart].visual_effect :blind_down if @cart.total_items == 1
page[:current_item].visual_effect :highlight,
:startcolor => "#88ff88",
:endcolor => "#114411"
edit app/models/cart.rb
class Cart < ActiveRecord::Base
has_many :line_items, :dependent => :destroy
def add_product(product_id)
current_item = line_items.find_by_product_id(product_id)
if current_item
current_item.quantity += 1
else
current_item = line_items.build(:product_id => product_id)
current_item.price = current_item.product.price
end
current_item
end
def total_price
line_items.to_a.sum { |item| item.total_price }
end
def total_items
line_items.sum(:quantity)
end
end
Look at the app/helpers director
ls -p app
controllers/
helpers/
mailers/
models/
views/
ls -p app/helpers
application_helper.rb
carts_helper.rb
line_items_helper.rb
products_helper.rb
store_helper.rb
Call a hidden_div_if helper
edit app/views/layouts/application.html.erb
<%= hidden_div_if(@cart.line_items.empty?, :id => 'cart') do %>
<%= render @cart %>
<% end %>
Implement helper
edit app/helpers/application_helper.rb
module ApplicationHelper
def hidden_div_if(condition, attributes = {}, &block)
if condition
attributes["style"] = "display: none"
end
content_tag("div", attributes, &block)
end
end
Remove notice
edit app/controllers/carts_controller.rb
def destroy
@cart = current_cart
@cart.destroy
session[:cart_id] = nil
respond_to do |format|
format.html { redirect_to(store_url) }
format.xml { head :ok }
end
end
Demonstrate emptying and recreating the cart
get /carts/2
Pragmatic Bookshelf
post /carts/2
get http://localhost:3000/
Pragmatic Bookshelf
CoffeeScript is JavaScript done right. It provides all of JavaScript's functionality wrapped in a cleaner, more succinct syntax. In the first book on this exciting new language, CoffeeScript guru Trevor Burnham shows you how to hold onto all the power and flexibility of JavaScript while writing clearer, cleaner, and safer code.
Ruby is the fastest growing and most exciting dynamic language out there. If you need to get working programs delivered fast, you should add Ruby to your toolbox.
Rails Test Prescriptions is a comprehensive guide to testing Rails applications, covering Test-Driven Development from both a theoretical perspective (why to test) and from a practical perspective (how to test effectively). It covers the core Rails testing tools and procedures for Rails 2 and Rails 3, and introduces popular add-ons, including Cucumber, Shoulda, Machinist, Mocha, and Rcov.
get /
Pragmatic Bookshelf
CoffeeScript is JavaScript done right. It provides all of JavaScript's functionality wrapped in a cleaner, more succinct syntax. In the first book on this exciting new language, CoffeeScript guru Trevor Burnham shows you how to hold onto all the power and flexibility of JavaScript while writing clearer, cleaner, and safer code.
Ruby is the fastest growing and most exciting dynamic language out there. If you need to get working programs delivered fast, you should add Ruby to your toolbox.
Rails Test Prescriptions is a comprehensive guide to testing Rails applications, covering Test-Driven Development from both a theoretical perspective (why to test) and from a practical perspective (how to test effectively). It covers the core Rails testing tools and procedures for Rails 2 and Rails 3, and introduces popular add-ons, including Cucumber, Shoulda, Machinist, Mocha, and Rcov.
post /line_items?product_id=2
get http://localhost:3000/
Pragmatic Bookshelf
CoffeeScript is JavaScript done right. It provides all of JavaScript's functionality wrapped in a cleaner, more succinct syntax. In the first book on this exciting new language, CoffeeScript guru Trevor Burnham shows you how to hold onto all the power and flexibility of JavaScript while writing clearer, cleaner, and safer code.
Ruby is the fastest growing and most exciting dynamic language out there. If you need to get working programs delivered fast, you should add Ruby to your toolbox.
Rails Test Prescriptions is a comprehensive guide to testing Rails applications, covering Test-Driven Development from both a theoretical perspective (why to test) and from a practical perspective (how to test effectively). It covers the core Rails testing tools and procedures for Rails 2 and Rails 3, and introduces popular add-ons, including Cucumber, Shoulda, Machinist, Mocha, and Rcov.
11.6 Iteration F6: Testing AJAX changes 11.3 Iteration F3: Highlighting Changes